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Niels Bohr Model is Introduced (Exact Date Unknown)
In 1913, Niels Bohr introduced a new model into Atomic Physics. It showed the atom circular like the solar system, with a positively charged Nucleus and electrons orbiting it. They were not orbiting in the same manner though, as planets orbit by gravity, and an electron orbits from a electromagnetic field. -
Henry Moseley Discovers the Proper way to organize elements.
Mr. Moseley discovered that the x-rays emitted by elements got progressively stronger as you went up in atomic number, so therefore they should be organized in a manner that reflected that and not the mass. -
Sir Francis William Aston Invents the Mass Spectrogram
He invented it to be able to see small particles in a large mass of an object. Through this he was able to discover isotopes of different atoms. Specifically he was able to find three different isotopes of hydrogen. This allowed scientists to understand that atoms weren't all cookie cutter fitting into the specific guidelines -
Werner Heisenberg Says that observing precise location is not necessary with atoms
Mr. Heisenberg found stated that just by you watching an atom that you are affecting its location and velocity. Therefore there cannot be a precise location because knowing the location means you are changing it. -
Louis de Broglie and the Atomic Wave Determination
Louis de Broglie discovered that Electrons don't move like planets in a Solar System. They move more like waves in the right conditions, and don't move the way that people thought they did.
